dotfiles/vim/plugins/vim-airline/autoload/airline/extensions/tabline/buffers.vim
2018-04-05 13:06:54 +02:00

252 lines
8.2 KiB
VimL

" MIT License. Copyright (c) 2013-2016 Bailey Ling.
" vim: et ts=2 sts=2 sw=2
scriptencoding utf-8
let s:buffer_idx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
let s:show_tab_type = get(g:, 'airline#extensions#tabline#show_tab_type', 1)
let s:buffers_label = get(g:, 'airline#extensions#tabline#buffers_label', 'buffers')
let s:spc = g:airline_symbols.space
let s:current_bufnr = -1
let s:current_modified = 0
let s:current_tabline = ''
let s:current_visible_buffers = []
let s:number_map = {
\ '0': '⁰',
\ '1': '¹',
\ '2': '²',
\ '3': '³',
\ '4': '⁴',
\ '5': '⁵',
\ '6': '⁶',
\ '7': '⁷',
\ '8': '⁸',
\ '9': '⁹'
\ }
let s:number_map = &encoding == 'utf-8'
\ ? get(g:, 'airline#extensions#tabline#buffer_idx_format', s:number_map)
\ : {}
function! airline#extensions#tabline#buffers#off()
augroup airline_tabline_buffers
autocmd!
augroup END
endfunction
function! airline#extensions#tabline#buffers#on()
augroup airline_tabline_buffers
autocmd!
autocmd BufDelete * call airline#extensions#tabline#buffers#invalidate()
autocmd User BufMRUChange call airline#extensions#tabline#buflist#invalidate()
autocmd User BufMRUChange call airline#extensions#tabline#buffers#invalidate()
augroup END
endfunction
function! airline#extensions#tabline#buffers#invalidate()
let s:current_bufnr = -1
endfunction
function! airline#extensions#tabline#buffers#get()
call <sid>map_keys()
let cur = bufnr('%')
if cur == s:current_bufnr
if !g:airline_detect_modified || getbufvar(cur, '&modified') == s:current_modified
return s:current_tabline
endif
endif
let l:index = 1
let b = airline#extensions#tabline#new_builder()
let tab_bufs = tabpagebuflist(tabpagenr())
for nr in s:get_visible_buffers()
if nr < 0
call b.add_raw('%#airline_tabhid#...')
continue
endif
let group = airline#extensions#tabline#group_of_bufnr(tab_bufs, nr)
if nr == cur
let s:current_modified = (group == 'airline_tabmod') ? 1 : 0
endif
" Neovim feature: Have clickable buffers
if has("tablineat")
call b.add_raw('%'.nr.'@airline#extensions#tabline#buffers#clickbuf@')
endif
if s:buffer_idx_mode
if len(s:number_map) > 0
call b.add_section(group, s:spc . get(s:number_map, l:index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
else
call b.add_section(group, '['.l:index.s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.']')
endif
let l:index = l:index + 1
else
call b.add_section(group, s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
endif
if has("tablineat")
call b.add_raw('%X')
endif
endfor
call b.add_section('airline_tabfill', '')
call b.split()
call b.add_section('airline_tabfill', '')
if s:show_tab_type
call b.add_section_spaced('airline_tabtype', s:buffers_label)
endif
if tabpagenr('$') > 1
call b.add_section_spaced('airline_tabmod', printf('%s %d/%d', "tab", tabpagenr(), tabpagenr('$')))
endif
let s:current_bufnr = cur
let s:current_tabline = b.build()
return s:current_tabline
endfunction
function! s:get_visible_buffers()
let buffers = airline#extensions#tabline#buflist#list()
let cur = bufnr('%')
let total_width = 0
let max_width = 0
for nr in buffers
let width = len(airline#extensions#tabline#get_buffer_name(nr)) + 4
let total_width += width
let max_width = max([max_width, width])
endfor
" only show current and surrounding buffers if there are too many buffers
let position = index(buffers, cur)
let vimwidth = &columns
if total_width > vimwidth && position > -1
let buf_count = len(buffers)
" determine how many buffers to show based on the longest buffer width,
" use one on the right side and put the rest on the left
let buf_max = vimwidth / max_width
let buf_right = 1
let buf_left = max([0, buf_max - buf_right])
let start = max([0, position - buf_left])
let end = min([buf_count, position + buf_right])
" fill up available space on the right
if position < buf_left
let end += (buf_left - position)
endif
" fill up available space on the left
if end > buf_count - 1 - buf_right
let start -= max([0, buf_right - (buf_count - 1 - position)])
endif
let buffers = eval('buffers[' . start . ':' . end . ']')
if start > 0
call insert(buffers, -1, 0)
endif
if end < buf_count - 1
call add(buffers, -1)
endif
endif
let s:current_visible_buffers = buffers
return buffers
endfunction
function! s:select_tab(buf_index)
" no-op when called in the NERDTree buffer
if exists('t:NERDTreeBufName') && bufname('%') == t:NERDTreeBufName
return
endif
let idx = a:buf_index
if s:current_visible_buffers[0] == -1
let idx = idx + 1
endif
let buf = get(s:current_visible_buffers, idx, 0)
if buf != 0
exec 'b!' . buf
endif
endfunction
function! s:jump_to_tab(offset)
let l = s:current_visible_buffers
let i = index(l, bufnr('%'))
if i > -1
exec 'b!' . l[float2nr(fmod(i + a:offset, len(l)))]
endif
endfunction
function! s:map_keys()
if s:buffer_idx_mode
noremap <silent> <Plug>AirlineSelectTab1 :call <SID>select_tab(0)<CR>
noremap <silent> <Plug>AirlineSelectTab2 :call <SID>select_tab(1)<CR>
noremap <silent> <Plug>AirlineSelectTab3 :call <SID>select_tab(2)<CR>
noremap <silent> <Plug>AirlineSelectTab4 :call <SID>select_tab(3)<CR>
noremap <silent> <Plug>AirlineSelectTab5 :call <SID>select_tab(4)<CR>
noremap <silent> <Plug>AirlineSelectTab6 :call <SID>select_tab(5)<CR>
noremap <silent> <Plug>AirlineSelectTab7 :call <SID>select_tab(6)<CR>
noremap <silent> <Plug>AirlineSelectTab8 :call <SID>select_tab(7)<CR>
noremap <silent> <Plug>AirlineSelectTab9 :call <SID>select_tab(8)<CR>
noremap <silent> <Plug>AirlineSelectPrevTab :<C-u>call <SID>jump_to_tab(-v:count1)<CR>
noremap <silent> <Plug>AirlineSelectNextTab :<C-u>call <SID>jump_to_tab(v:count1)<CR>
endif
endfunction
function! airline#extensions#tabline#buffers#clickbuf(minwid, clicks, button, modifiers) abort
" Clickable buffers
" works only in recent NeoVim with has('tablineat')
" single mouse button click without modifiers pressed
if a:clicks == 1 && a:modifiers !~# '[^ ]'
if a:button is# 'l'
" left button - switch to buffer
silent execute 'buffer' a:minwid
elseif a:button is# 'm'
" middle button - delete buffer
if get(g:, 'airline#extensions#tabline#middle_click_preserves_windows', 0) == 0
" just simply delete the clicked buffer. This will cause windows
" associated with the clicked buffer to be closed.
silent execute 'bdelete' a:minwid
else
" find windows displaying the clicked buffer and open an new
" buffer in them.
let current_window = bufwinnr("%")
let window_number = bufwinnr(a:minwid)
let last_window_visited = -1
" Set to 1 if the clicked buffer was open in any windows.
let buffer_in_window = 0
" Find the next window with the clicked buffer open. If bufwinnr()
" returns the same window number, this is because we clicked a new
" buffer, and then tried editing a new buffer. Vim won't create a
" new empty buffer for the same window, so we get the same window
" number from bufwinnr(). In this case we just give up and don't
" delete the buffer.
" This could be made cleaner if we could check if the clicked buffer
" is a new buffer, but I don't know if there is a way to do that.
while window_number != -1 && window_number != last_window_visited
let buffer_in_window = 1
silent execute window_number . 'wincmd w'
silent execute 'enew'
let last_window_visited = window_number
let window_number = bufwinnr(a:minwid)
endwhile
silent execute current_window . 'wincmd w'
if window_number != last_window_visited || buffer_in_window == 0
silent execute 'bdelete' a:minwid
endif
endif
endif
endif
endfunction